The 16-cell stage is known as the:
A) morula. B) trophoblast. C) blastocyst. D) blastomere.
Answer: A
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The effects of epinephrine on vascular resistance are dependent upon which of the following?
A) relative distribution of alpha and beta receptors B) concentration of local metabolites C) direction of change in mean arterial pressure D) specific baroreceptor activated (low or high pressure) E) relative distribution of nicotinic and muscarinic receptors
Which of the following statements accurately describes the pattern of ventricular contraction?
A. The ventricles contract from the base toward the apex moving blood into the great arteries located superior to the ventricles. B. The ventricles contract from the apex toward the base moving blood into the great arteries located inferior to the ventricles. C. The ventricles contract from the base toward the apex moving blood into the great arteries located inferior to the ventricles. D. The ventricles contract from the apex toward the base moving blood into the great arteries located superior to the ventricles.
The function of the postcapillary venule is to
A. drain the capillary bed. B. allow for diffusion of metabolic wastes from the tissues. C. allow for diffusion of nutrients to the tissues. D. supply metarteriole with blood. E. allow for diffusion of nutrients and metabolic wastes.
Which of the following individuals would have more mitochondria in her skeletal muscle?
A) A long-term hospice patient B) A 50-year-old sedentary computer programmer C) A model on a reduced-calorie diet D) A newborn E) A 22-year-old soccer player